Borla Npp valves wont close

KILLA BEE · 08-24-2019, 03:37 PM

Has anyone on here gotten there car hp tuned with the stock Npp then installed an after market Npp and It didn't cooperate. Did you have to change the Npp settings.

Chris C 1SS 1LE · 08-25-2019, 11:17 AM

Transpose the NPP actuators when put Borla on? That's one thing to check. My springs were wicked tight and wouldn't close. Borla sent me new ones with less spring tightness. Work fine. Hope this helps you sir.

I'm not HP tuned, however.

08-24-2019, 03:37 PM	#1
KILLA BEE Black lightning Drives: 2021 ZL1 1LE A10 Join Date: Mar 2013 Location: Nottingham Md Posts: 1,997 View My Garage	Borla Npp valves wont close Has anyone on here gotten there car hp tuned with the stock Npp then installed an after market Npp and It didn't cooperate. Did you have to change the Npp settings. __________________ [ 2021 Camaro ZLE 10 speed

08-25-2019, 11:17 AM	#2
Chris C 1SS 1LE Drives: 2017 1LE Join Date: Nov 2017 Location: Brooks, GA Posts: 697	Transpose the NPP actuators when put Borla on? That's one thing to check. My springs were wicked tight and wouldn't close. Borla sent me new ones with less spring tightness. Work fine. Hope this helps you sir. I'm not HP tuned, however. __________________ '17 Bright Yellow 1LE. PDR, STB, !CAGS Borla 60606, 11925. Tony Mamo ported TB, ROTOFAB, !Sound Tube Last edited by Chris C 1SS 1LE; 08-25-2019 at 11:19 AM. Reason: Explain

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